Do Screws Shear easier than Nails? Let's find out!

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  • Published on: 17 June 2019
  • Shear strength of nails and screws is something to consider when selecting a fastener for a project. For building construction, building codes come into play and some screws, such as GRK (tested per viewer request), are building code approved for some applications. A total of seven different types of nails and screws are tested in 3 types of tests to determine shear strength of each type of nail or screws. Fasteners: GRK, deck screws, drywall screws, spiral shank, galvanized 16 penny, and 16D sinkers. I purchased all the products tested and am not sponsored by any company or brand.

    Thank you very much for supporting the channel by watching the commercials and through Patreon support. https://www.patreon.com/projectfarm

    This video is only for entertainment purposes. If you rely on the information portrayed in this video, you assume the responsibility for the results. Project Farm LLC
  • Runtime : 13:30
  • Seafoam marvels marvel mystery oil seefoam Sea foam Seefoam See Foam wd-40 project farm which nail has most holding strength spiral shank galvanized nail coated sinker uncoated 16 penny 16d nail strongest nail ring shank nail nail testing nail strength project farm nail strength test nail holding strength sheer shear shear strength nail shear strength shear load building code grk

COMMENTS: 40

  • KeepIt Real
    KeepIt Real   10 hours ago

    Screws have little to no shear strength unless they are structural screws. This is why houses are built with nails, not screws.

  • Daniel
    Daniel   1 days ago

    I don’t even know what the title of the videos means but I shall watch anyway because Canadians

  • Chris Wyrick
    Chris Wyrick   3 days ago

    At 5 minutes in I realized the tested fastener was pinned to the side of the wood as a reference. Took me that long to see it. Maybe I am retarded.

  • Andrew B
    Andrew B   3 days ago

    I like your channel but the title is misleading, this was not a shear strength test.

  • wetherman122288
    wetherman122288   6 days ago

    Could you do a test comparing lag bolts to structural screws please

  • Ben Runyan
    Ben Runyan   1 weeks ago

    I feel that you should have braced the first test against the wood so that it sheared them off rather than pulling them out due to uneven force

  • FullOilBarrel
    FullOilBarrel   1 weeks ago

    I'm always impressed by how methodical your tests are

  • Kim Bergeron
    Kim Bergeron   1 weeks ago

    This is my 1st ever criticism of all the videos you have done. In watching this video the test with wood are not seeing the fastener fail, it's the wood that failed, then the fastener was extracted by the test jig. The bending test was valid.Overall, I still give your videos 5-stars.

  • FFA2016
    FFA2016   1 weeks ago

    Hi, nice videos but aren't you just pulling out the wood with the screws and not test the screws?

  • BOSS FORD
    BOSS FORD   2 weeks ago

    Still the best thing on youtube

  • Roberto moe
    Roberto moe   2 weeks ago

    Love the work this guys puts into his videos... he loves what he does and I love to watch

  • Charistiaan Harmse
    Charistiaan Harmse   2 weeks ago

    Screws will shear at the threshold as stress is concentrated at sharp corners

  • Brandy Ellis
    Brandy Ellis   2 weeks ago

    Can these tests be repeated in the way that I assume manufacturers test their own products? Testing purely shear force, with no room for the fastener to pull out? Awesome video. I continue rewatching these videos :)

  • rickrudd
    rickrudd   2 weeks ago

    Love all you do - these tests have been absolutely great. Question I have is: we all know end grain doesn't hold fasteners very well at all, why not try face grain for these tests?

  • Toros Cosmicos
    Toros Cosmicos   2 weeks ago

    This should shut down the "pros" that say nails only for deck fasteners and to only screw deck boards down.

  • sunriseshell
    sunriseshell   3 weeks ago

    Not shear, you need a test jig that keeps the board from pulling out.

  • Rob True
    Rob True   3 weeks ago

    You can snap off a hard screw- you can't with a nail.A nail has to be pulled, cut, or driven .

  • Brian H
    Brian H   3 weeks ago

    So in the end, its not that they are going to snap, its taht the wood will fail.

  • chuyg92
    chuyg92   3 weeks ago

    I know this is off topic in regards to this video but have you ever thought about testing POR-15 as a bed liner or external coating?

  • Archive 3DO
    Archive 3DO   3 weeks ago

    Have you tried testing what concrete mixtures are the best? I want to build a small patio to work on my car to restore it but I want the best concrete mixture per cost so it will last.

  • Dan Bierschbach
    Dan Bierschbach   3 weeks ago

    im always struck by how you come up with the testing devices. so clever. well done sir.

  • deiselgas
    deiselgas   3 weeks ago

    Id like to see a shear test of various concrete anchors such as Tapan screws, lag bolt shields, expansion bolts ect.

  • Paul G
    Paul G   3 weeks ago

    wow, those deck and GRK screws were interesting, they must be a hardened steel.

  • Kainoa Ladines
    Kainoa Ladines   3 weeks ago

    Can you do a test on strength and corrosion resistance with nuts and bolts or metal anything in general. I want to see if you could show the difference with 316 stainless, 304 stainless, steel and galvanized. Preferably with fasteners. We all buy nuts and bolts. But I don’t know the value in stainless 316 vs 304 to be honest.

  • Michael J. Caboose
    Michael J. Caboose   3 weeks ago

    1) I love your videos!! This is the kind of content people should see more of :)2) I am interested in the standard deviations for these tests. Were some fasteners more consistent in performance than others? How much confidence can we have in the results we've seen? Introducing statistics to quantitative tests like these can tell us a great deal more about these fasteners and their quality.3) Graph/chart of performance (lb force) per cost, perhaps?Just some ideas to mull over :)

  • Paul Z
    Paul Z   3 weeks ago

    how about stainless steel nails or screws ?

  • Macks Power
    Macks Power   3 weeks ago

    This is some very useful information, but it doesn't necessarily mean one type is better or worse, just different.Learning the limitations and benefits means you can customize use, make things more efficient etc.For example, when laminating boards I'll usually use screws on the ends, top and bottom, then quickly run back over the beam with a pneumatic framing nailer.The screws prevent withdrawal at the edges. If separation doesn't start in the field, well, it can't start in the middle.The nails in the middle are cheaper, faster, and I don't have to worry about separation because of the screws.One of the nails I started using recently seems to have a glue on the shank which is heated and activated when driven in with a pneumatic nailer. I guess we'll see if it helps in a few decades.

  • Tetra Digm
    Tetra Digm   3 weeks ago

    thats ALOT of variance in your nails. you need to run this test again, but not use some shit tier home depot 5$ a box nails, and use QUALITY nails. the level of variance between nails of the same type here is disgusting.

  • Scarakus
    Scarakus   4 weeks ago

    Great enthusiasm, It's like listening to a horse race, lmao!

  • Scarakus
    Scarakus   4 weeks ago

    1 16 penny coated nail can keep you from falling off a 7:12 pitch roof... lol

  • RD Osborne
    RD Osborne   4 weeks ago

    I already know but I'll still watch. 🤦‍♂️

  • cat gath
    cat gath   4 weeks ago

    I like using drywall screws as a temp anker. They last long enough to get a proper anker in and help keep the joint together. The fact that they are in the bargain bin all the time helps too.

  • Ken Fullman
    Ken Fullman   4 weeks ago

    You claim that the final test shows what happens under repeated motion, yet that's not quite the case. You're pushing them BEYOND their elastic limit so it's not testing resistance to "repeated motion" You're simply finding that the elastic limit is different. Since you don't even measure how much force is required to reach that elastic limit (some will bend all that way easier than others) this last test is worthless. If you really wanted to test their vulnerability to metal fatigue, you should have applied a constant FORCE back and forth. I suspect you'd then have a completely different outcome.

  • Niko Nissinen
    Niko Nissinen   4 weeks ago

    You sure it was the nail or screw that moved, not the wood giving up? I mean you can't introduce infinite amount of force to the wooden block even if the nail or screw could handle that. You need a better test to test the nails and screws strenght.

  • John Smithy
    John Smithy   4 weeks ago

    Good to know. Thank you for making the video.

  • Mike Sokolow
    Mike Sokolow   4 weeks ago

    Wow, my house is all hard wood, except the kitchen and bathroom, built in 1963. Never had squeak one in the floors, been here since 83. Wonder what they used?

  • Sony XperiaThree
    Sony XperiaThree   4 weeks ago

    You are only demonstrating the weakness of the soft wood, not the fasteners. This is a very poor and unscientific test.